Why is Greece in such desperate straits? Who, in between thieving bankers, lying politicians and reluctant taxpayers, is really responsible? What's worse: staying in the single currency, or Grexiting? What will be the knock-on effects for Europe and the eurozone? And what does it mean for me and my summer holiday?

For more than two years now, Greece's plight – and the and the European Union's slow-motion response to it – has dominated headlines. These are large and complex issues with potentially dramatic consequences for the prosperity of a continent (and hence, to some degree, for our futures), yet few of us would pretend to fully understand them.

He makes no bones about the fact that he believes Greece should cut its losses and withdraw from the euro at the earliest opportunity, and also argues that broader European austerity is counterproductive, likely to lead to a longer and deeper recession and the end of the monetary union. Ultimately, he feels the people of Europe must gain democratic control over their financial institutions, and ensure they are restructured in the best interests of the people, not the banks.

He has agreed to answer your questions on Greece and the eurozone crisis in G2. He positively welcomes professions of ignorance or incomprehension, and is encouraging readers to think as big and as basic – or as small and specialist – as they like. So please, post your queries below or email them to g2feedback@guardian.co.uk with "For Costas" in the subject line. We will choose the dozen or so that look most likely to produce the most comprehensive picture of why Greece is really suffering, and what should best be done about it.